MDS PREP
A 10-year-old child presents with anaemia and recurrent fractures. The X-ray shows diffuse hyperdensity of bone. The diagnosis is most likely to be
1. Osteogenesis imperfecta
2. Osteopetrosis
3. Osteochondroma
4. Hyperparathyroidism
The diagnosis for a child with anemia and recurrent fractures showing diffuse hyperdensity of bone is osteopetrosis.
The extracellular polysaccharide synthesized by cariogenic streptococci in the presence of excess sucros is best described as
1) Mucopolysaccharide
2) Dextran-like glucan
3) Glycogen-like glucan
4) Amylopectin
Oral Pathology
Answer: 2
Cariogenic streptococci, particularly Streptococcus mutans, synthesize extracellular polysaccharides when exposed to high levels of sucrose. These polysaccharides are primarily dextran-like glucans, which are formed from the polymerization of glucose units. Dextran contributes to the formation of dental plaque and biofilm, facilitating the adherence of bacteria to tooth surfaces and promoting caries development.
The skin of a patient undergoing radiotherapy will show after 2 weeks
1. Erythema
2. Depigmentation
3. Radiation-induced carcinomas
4. No change
Oral Pathology
Answer: 1
The skin of a patient undergoing radiotherapy will show erythema after 2 weeks.
Disease which increases oral melanin pigmentation
1. Addison"s disease
2. Hyperthyroidism
3. Nephritis
4. All of the above
Oral Pathology
Answer: 1
Diseases that increase oral melanin pigmentation include Addison's disease.
Darier"s disease is the other name for
1. Pernicious anaemia
2. Deficiency of Vit A involving mucosa and epithelium
3. Rickets involving teeth and bones
4. Protein malnutrition
Oral Pathology
Answer: 2
Darier’s disease is associated with a deficiency of Vitamin A involving mucosa and epithelium.
The burtonian line around the gingival is caused by the absorption of
1. Lead
2. Copper
3. Mercury
4. Bismuth
Oral Pathology
Answer: 1
The Burtonian line around the gingival is caused by the absorption of lead.
An abnormal resorption pattern in primary teeth, delayed eruption of permanent teeth and a large tongue are the features of
1. Addison"s disease
2. Hypothyroidism
3. Hyperthyroidism
4. Von-Recklinghausen disease
Oral Pathology
Answer: 2
Hypothyroidism is characterized by abnormal resorption patterns in primary teeth and delayed eruption of permanent teeth.
Which of the following is associated with a low concentration of ionized calcium in the serum?
1. Hypothyroidism
2. Osteogenesis imperfecta
3. Paget"s disease of the bone
4. Tetany
Oral Pathology
Answer: 4
Tetany is associated with a low concentration of ionized calcium in the serum.